Carbtjbetok



April 8, 1924.`

c. w. HouGH CARBURETOR Filed March 21. 1921 MTA/5355s."

Patented Apr, 8, 1924.

UNITED STATES PATENT OFFICE.

CARBURETOR.

Application led. March 21, 1921.

To all 107mm it may comic/rn.'

Be itknown that l7 CmN'roN lV. Hoffen, a citizen of the United Fitates, residing` at Boonville1 in the county of Oneida and State of New York. have invented certain new and useful Improvements in Carburetors. of which the 'following is a specification.

This invention relates te carburetors and has particular reference to an improved fuel valve for controlling the feed of raw fuel to the air stream.

A primary object of the invention is to provide a fuel valve havingthe capacity for regulating the supply of raw fuel to the mixing throat of the carburetor in such a manner as effectively and direct-ly to distribute the raw fuel into the air passing' through the carburetor to maintain manimuin efciency of carburation. Fuel inlet devices or fuel valve of the type providing only a single feed orifice supply the raw fuel to the mixing chamber in a more or less concentrated state in a single jet which results in an improper mixing of the air and liquid fuel in horizontal carburetors because of the factthat the latter is only brought into Contact with the lower strata of air passing through the mixing chamber.

rlhe present invention therefore contemplates a device that will distribute the fuel throughout the entire cross section of the incoming air to more thoroughly mix the air and fuel and thereby obtain a more economical operation ofthe carburetor for varying motor speeds,

A further and more specific object of the invention is to Aprovide a measuring fuel valve providing a plurality of raw fuel dis charge orifices adapted to be automatically brought into play `to meet all conditions of running, such for instance as starting, idling. slow running, and speed.

With the above and other objects in view which will more readily appear as the nature of the invention is better understood. the same consists in the novel construction, combination and arrangement of parts hereinafter more fully described. illustrated and claimed.

A preferred and practical embodiment of the invention is shown in the accompanying drawings, in which- Figure l is a vertical sectional view of the mixing portion of av carburetor,4

Serial No. 454,088.

responding parts throughout the several figures of the drawings.

T he present invention is intended and especially adapted for use in connection with standard carburetor structure of the type, for example. shown in U. S. Patent No. .l.3ll696 dated June 29. 1920. The invention is. therefore, primarily concerned with the provision of an improved fuel inlet and distributing device or so called metering or measuring pin which will provide a thorough and practical mixing of the raw fuel with the air in a more effective manner than possible where'the raw fuel is supplied in a single jet substantially at the bottom of the air intake passage.

ln the type of carburetor referred to in U. S. Patent No. 1,344,696. the .fuel valve is automatically moved by an air pist-on controlled by the suction of the motor thereby to vary the fuel supply in accordance with different running speeds. the setting of the carburetor for temperature. altitude. and maximum and minimum power requirements being accomplished by an adjustable sleeve or feed regulator controlled from the dash of the machine.

There only a single feed orifice is provided, the propersupply is not provided for all motor speeds. To obtain smooth and economical operation of the motor. the fuel outlet area in the fuel valve should vary following an irregular curve and not a straight line. This is, for starting. idling and very slow running, the area. ofthe orifice should be relatively large because the suction of the jet is comparatively low, but when the motor speeds up and the suction increases, a smaller fuel outlet area will suffice. Then, as more and more power is required and speed further increases, larger iet areas may be brought. into play following a curve which is 1n relation to the characteristics of the motor. It is.; therefore, the object of the g i ,tecnico present device to s poly the correct quantity raw fuel :iii t eoiiit ier 'with the air uut 4 live. mice to the accorlo .iserved that carrying dreivii 't s des red result one Way oit accompli 'shine` the is to provide a hellma7 o lievingz; a plurality of which are adeL d others man; be autoniaticallvV brought into nlav accordance with the speed developed o v me operation of the motor.

lo. the embodiment shown in Vthe eccoe nani/ingr drawings, t i tubular vfuel velii lis n neralilv formen its upper end 2 to receive a closure p .0* havinm an open.-

piston il ed and into the entire cross section. olf the ineen i inef air stream Wlieehjif it is effectively distributed and calibrated in accordance with the nredetern'iined conditions 'to be :met in the iunctioninrg of the enejine or motor.

Adjacent the starting; oritice 7 of tie ini ior of the tubular meas ring; pin is provided with a valve seat 9 for receiving; the taperingw end l0 of a graduating 'tuel valve l?, which is normallyheld to its smit hy the eoninressed spring l2 housed witl n tno tube and connedhetiveen the closure nluof ,fl and the rear end of the valve liodv. seid gradini, ,n valve is nroY-.fided Awith a steer extension which extends through and berend the onen end lli ot' the tubular liodv ot' the nin ivi re it is provided ith an adjustable hearing nut lo or equivalent adanted to engae'e with su yhie abutment liiiin tl bottoni ot the ruel Well W ot' the carburetor. The provision of this adjustable hearingr mencher ifi enables the era diiatinc valve ll to loe in such a position that it is normally held anari from its seat 9 in theiuterior ont the tube when. the iotor is at resy to provide onen coinrnunication between the 'iuel supjoljv chamber F7 and the starting' orifice i', ivlierehjv, when the motor is turned over to stort, a priming quantity et fuel maybe readily aveilehle. As the motor sneed incre and the suction through the air intalre becomes 4sweater.. the piston 6 will rise due to the partial exhaustionof air :trom the chamber C through the passageway C2.

Jliroiirdi the starting ori- :he uel to he sucked r sleeve portion i7 ot the oline `leed regulator i ilatorw 'ich isnianuffl l5 COU- sli tliionifffh taie rangement i8, 19 and Q0 `i pull operati: rod leadingr 9 to the dzish. as rally de- Patent No. Lllllt) previyion described provides a rstarting'j idling, and very i .i :inl au,oinatieally operates 'to a leaner mixture is as the is Well under Way. Thon, es the "eases sneed and the piston (i in the clian'ilier C, it will r fuel inlet and distributing telve turther out oit the sleeve o'esoline feed refg'ulz-itor to se a greater number of runningjiet ori if, es e or vice versa to thereby increase and the quantity oi gasoline as required under existing conditions at varying; inotor speelsD following the characteristic curves YL he elicotof providing a hollow or tubuffiiel inlet and distributing device or soed metering pin with the starting orifice and runningV orifices 'which are automatiin more or less concentrated single ain, the device constitutinlr the present oif'einent provides for breaking up and noting the raw tuel in the air stream to more thoroughly saturate the v moving air with the fuel to obtain l' mixture for all runningr conditions. will, therefore, he apparent that the invention is particularly directed to a tubular Jfuel inlet and distributing device for tual VTvalves having ports oi different area so distributed and arranged as to meet automatically the fuel needs oil' the motor under storting, idlingr and vtying load conditions.

lVitliout itin-ther descriptionj it is thought that the :tentures and advantages of the iniproveeient will be readily apparent to those skilled in the art, and it Will7 of course, be understood that changes in the form, proportion and details of construction may be resorted to without departing from the spirit of the invention or scope of the appended claims.

I claim:

l. In a carburetor, a piston controlled and operated fuel inlet and distributing device having a plurality of fixed capacity fuel vaporizing orifices adapted to be succes sively moved into discharging position at all running positions of the controlling piston. and also having a variable capacity fuel outlet discharging into the air stream at the starting and idling positions of the piston, spring tensioned valve means for controlling said vai-fable capacity fuel outlet whereby it is gradually closed by the spring tensioned valve following the upward movement of the operating piston thereby to graduate the amount of fuel supplied under the starting and idling positions.

2. In a carburetor the combination of a vertically movable. suction controlled piston, a tubular fuel inlet and distributing device, said fuel inlet having a starting and idling orifice and a plurality of orifices feeding fuel for normal running, a relatively fixed sleeve member cooperating with the fuel inlet and normally closing the orices feeding fuel for normal running, said fuel inlet being operated by the piston to 'bring the orifices feeding fuel for normal running into operation successively as the piston lifts, a valve for controlling the starting and idling orifice, and means for adjusting the position of said valve comprising a valve stem of adjustable length.

3. In al carburetor, the combination of a suction controlled piston, a tubular fuel inlet and distributing device having a starting and idling orifice and a plurality of orifices feeding fuel for normal running, a relatively fixed sleeve member cooperating with the fuel inlet device and normally closing the orifices feeding fuel for normal running, said fuel inlet device being operated by the piston to bring the orifices feeding fuel for normal running into operation successively as the piston lifts, a valve arranged between the starting and idling ori ices, and means for keeping the valve unseated while the piston is down and closing the same when the piston lifts.

In testimony whereof I hereunto afiix my signature in the presence of two witnesses.

CLINTON TALLACE HOUGH.

Witnesses:

C. I-I. JULIUS, F. W. PAYLER. 

